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Z-type CdIn2S4/NiCr-LDH heterojunction photocatalyst and preparation method and application thereof

A photocatalyst, cdin2s4 technology, applied in the field of photocatalysis, achieves the effect of low raw material cost, simple preparation method and mild preparation conditions

Inactive Publication Date: 2021-10-15
CHINA JILIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Based on CdIn 2 S 4 Constructing a Z-type heterojunction photocatalyst with NiCr-LDH, using the synergistic effect between them to improve the separation efficiency of photogenerated carriers without sacrificing redox ability, is an effective way to obtain high-efficiency photocatalytic composite materials, but Research in this area has rarely been reported

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  • Z-type CdIn2S4/NiCr-LDH heterojunction photocatalyst and preparation method and application thereof
  • Z-type CdIn2S4/NiCr-LDH heterojunction photocatalyst and preparation method and application thereof
  • Z-type CdIn2S4/NiCr-LDH heterojunction photocatalyst and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Example 1: CdIn 2 S 4 Preparation of / NiCr-LDH photocatalyst

[0031] Dissolve 523mg of nickel nitrate hexahydrate, 240mg of chromium nitrate nonahydrate, and 480mg of urea in 60mL of ionized water, put them into a high-pressure hydrothermal reaction kettle, and react at a constant temperature of 180°C for 10 hours. After washing and drying, NiCr-LDH powder (NC- 180).

[0032] Dissolve 64mg of cadmium nitrate tetrahydrate, 126mg of indium nitrate and 120mg of thioacetamide in 60ml of deionized water, put them into a high-pressure hydrothermal reaction kettle, and react at a constant temperature of 180°C for 12 hours, wash and dry to obtain CdIn 2 S 4 (CIS).

[0033] Add 100mg of prepared NiCr-LDH powder into 30ml of deionized water, and ultrasonicate for 15min to obtain a uniformly dispersed suspension A; dissolve 30mg of thioacetamide in 10mL of deionized water to obtain solution B; mix 32mg of cadmium nitrate tetrahydrate and Dissolve 63mg of indium nitrate in 20...

Embodiment 2

[0047] 1) Preparation of photocatalyst

[0048] (a) Preparation of NiCr-LDH:

[0049] The difference from Example 1 is that 111 mg of ammonium fluoride was added to the reaction solution.

[0050] (b) CdIn 2 S 4 Preparation of / NiCr-LDH composite photocatalyst: same as example 1.

[0051] Using the test method described in Example 1 to test the efficiency of the photocatalyst produced in this example to split water and produce hydrogen reached 464 μmol g -1 h -1 .

Embodiment 3

[0053] (a) Preparation of NiCr-LDH:

[0054] The difference from Example 1 is that the hydrothermal reaction temperature is 150°C.

[0055] (b) CdIn 2 S 4 Preparation of / NiCr-LDH composite photocatalyst: same as example 1.

[0056] Using the test method described in Example 1 to test the efficiency of the photocatalyst produced in this example to split water and produce hydrogen is 269 μmol g -1 h -1 .

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Abstract

The invention belongs to the technical field of photocatalysis, and particularly relates to a Z-type CdIn2S4 / NiCr-LDH heterojunction photocatalyst and a preparation method and application thereof, the CdIn2S4 / NiCr-LDH heterojunction photocatalytic material is prepared by loading CdIn2S4 on a NiCr-LDH two-dimensional layered nanosheet, and forming Ni-S bonds on an interface for tight combination. According to the CdIn2S4 / NiCr-LDH photocatalyst, the conduction band and valence band potential of CdIn2S4 is higher than that of NiCr-LDH, so that the separation of photo-induced electrons and hole pairs in heterojunctions can be promoted; in the photocatalytic process, a Z-type photon-generated carrier transfer path retains relatively strong oxidation-reduction capabilities of electrons and holes while inhibiting recombination of photo-generated charges. Meanwhile, both the CdIn2S4 and the NiCr-LDH have visible light response capability, so that the CdIn2S4 / NiCr-LDH heterojunction photocatalytic material has excellent capability of photocatalytic decomposition of water to produce hydrogen and reduction of heavy metal ions Cr (VI). The preparation method is simple, mild in reaction condition, convenient to operate, low in cost and easy to realize industrial large-scale production, and has a certain application prospect in the aspect of green energy.

Description

technical field [0001] The invention relates to the field of photocatalysis technology, in particular to a Z-type CdIn 2 S 4 / NiCr-LDH heterojunction photocatalyst and its preparation method and application. Background technique [0002] Energy is the basis for the development of human civilization. The existing energy structure's heavy dependence on fossil fuels has caused environmental problems such as energy crises and excessive emissions of large amounts of greenhouse gases and harmful gases. In order to maintain the sustainable development of modern society and achieve the goal of carbon peaking as soon as possible, it is very important to develop a technical means that can convert abundant solar energy into a stable energy form that is easy to store, transport and use under mild conditions . In addition, with the development of industrialization, the problem of water pollution caused by heavy metal ions and organic pollutants is becoming more and more serious, whic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/86B01J27/04B01J27/049B01J35/00C01B3/04C02F1/30C02F1/70C02F101/22
CPCB01J27/049B01J23/007B01J23/866B01J27/04C01B3/042C02F1/30C02F1/70C02F2305/10C02F2101/22B01J35/39Y02E60/36
Inventor 付娆宫银燕李灿牛棱渊刘心娟
Owner CHINA JILIANG UNIV